Cavalieri, Buonaventura, Geometria indivisibilibvs continvorvm : noua quadam ratione promota

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405385LIBER V. integræ hyperbolæ, ſiat autem parallelogram mum ſub di-
cta baſi, &
axi, vel diametio, in angulo ab eiſdon comen-
to, ſumpta baſi pro regula:
Omnia quadrata dicti paralle.
logrammi ad omnia quadrata trilinei extia hypeibolam
conſtituti, erunt vt idem parallelogran n@un ad ſuiieli-
quum ab eodem dempta ſemil yperbola, vna cum exceſſu,
quo dicta ſemihyperbola ſuperat.
dicti parallel@ gram-
mi, cum {1/6}.
parallelogrammi ſub targente hyperbolan, &
axis, vel diametri hyperbolæ ea poitione, ad quam teli-
qua ſit, vt integra axis, vel dian eter ad eiuſdem latus
tranſuerſum.
Sit ergo axis, vel diameter hyperbolę, BE, cuius
276[Figure 276] dimidia, BED, latus tranſuerſum, AB, &
in angu-
lo, BED, ſub, BE, ED, conſticutum parallelogrã-
mum, GE, ſit autem, vt, EB, ad, BA, ita, EH, ad, H
B, &
per, H, ducta, HM, parallela ipſi, ED, quę ſu-
matur, pro regula, ita vt ſit conſtitutum parallelo-
grammum ſub, HB, &
ſub, BG, quæ erit tangens
hyperbolam in puncto, B.
Dico gitur omnia qua-
drata, BD, ad omnia quadrata trilinei, BGD, eſſe
ut, BD, ad ſui reliquum, dempto ab eodem ſemihyperbola, BE
D, vna cum exceſſu, quo ipſa ſuperat {1/3}.
dicti paralle ogran mi, B
D, cum {1/6}.
B M. Nam omnia quadrata, BD, ad rectangula ſub, B
D, &
ſemihyperbola, BED, ſunt vt, BD, adiplam, BED, rectan-
11Coroll. 1.
26. 2.
gula verò ſub, BD,, &
BED, æquantur rectangulis ſub, BOD, B
ED, ſimul cum omnibus quadratis, BED, ergo omnia quadrata,
BD, ad rectangula ſub, BGD, BED, cum ommbus quadratis, BE
22C Co. 23.
l. 2.
D, erunt vt, BD, ad, BED;
ſunt autem omnia quadrata, BD, ad
omnia quadrata, BED, vt, AE, ad compoſitam ex {1/2}.
AB, & {1/3}. B
E, .
i. vt, BE, ad compoſitam ex {1/2}. BH, & {1/3}. HE, quia, AE, BE,
proportionaliter diuiduntur in punctis, B, H, .
i. vt parallelogram-
33I. huius mum, BD, ad compofitum ex {1/2}.
BM, & {1/3}. HD, . i. vt, BD, ad
compoſitum ex {1/3}.
BD, & {1/6}. BM, ergo omnia quadrata, BD, ad
rectangula ſub, BGD, BED, erunt vt, BD, ad exceſſum, quo ſe-
445. l. 2. mihyperbola ſuperat {1/3}.
BD, cum {1/6}. BM, erant autem omnia qua-
drata, BD, ad rectangula ſub, IGD, BED, vna cum ommb.
qua-
dratis, BED, vt, BD, ad, BED, ergo omnia quadrata, BD, ad
rectangula bis ſub, BGD, BED, vna cum omnibus quadratis,

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